Abstract: To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical element 1090A having optical surfaces 1091 and 1092 and a non-optical surface 1093A that is adjacent to the optical surface 1092 via a ridge by injection molding includes forming the non-optical surface 1093A with a mold surface. The mold surface includes a sink forming area 1095 as a first area having a first surface roughness, and a high transfer area 1094 as a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.

Abstract: Systems and methods for additive manufacturing a homogeneous optical element are disclosed herein. A homogeneous pattern of light is shined on a polymerizable liquid to form each polymerized solid layer of the optical element.

Abstract: A method includes: providing lens blank data relating to the first, second and peripheral blank surfaces of the lens blank; providing optical lens data relating to the first, second and peripheral optical surfaces of the optical lens; virtually positioning the optical lens in the lens blank in a position so that at least one of the first optical surface or the second optical surface is included within the lens blank; evaluating a manufacturing prism cost function, the machining prism cost function corresponding to a weighed sum of the first manufacturing prism to be used when blocking the lens blank on the second surface to machine the first optical surface and of the second manufacturing prism to be used when blocking the lens blank on the first optical surface to machine the second optical surface. The positioning and evaluation steps are repeated so as to minimize the manufacturing prism cost function.

Abstract: An insert assembly for the purpose of an injection mold for manufacturing a first casting mold half of a casting mold for manufacture of an ophthalmic device, wherein the insert assembly is receivable in an injection mold half of the injection mold and wherein the insert assembly includes an insert assembly end surface which bounds an injection mold cavity of the injection mold for forming a first casting mold half.

Abstract: The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a hydrogel contact lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves having an absorbing antireflective coating, wherein the reusable mold is a non-plastic mold.

Abstract: Described herein are acyl germanium photoinitiator for cost-effective and time-efficient method for producing UV-absorbing contact lenses capable of blocking ultra-violet (“UV”) radiation and optionally (but preferably) violet radiation with wavelengths from 380 nm to 440 nm, thereby protecting eyes to some extent from damages caused by UV radiation and potentially from violet radiation. This invention also provides a method for making UV-absorbing contact lenses made by using an acyl germanium photoinitiator of the invention.

Abstract: Methods for improving the manufacturing of optical gratings and surface relief grating structures are described. An optical grating may be formed by spin coating a liquid monomer solution that includes a solvent, a liquid monomer, and a nanoparticle filler with a higher refractive index than the liquid monomer on a substrate. The optical grating may be formed by pressing a mold that includes nanostructures on its surface into the liquid monomer to form gratings and then hardening the liquid monomer while the mold is held within the liquid monomer. After the mold has been pressed into the liquid monomer, two regions within the liquid monomer may be formed: a first region that includes the gratings and that does not include nanoparticles (or that includes less than a threshold number of nanoparticles) and a second region arranged below the gratings that includes nanoparticles.

Abstract: Method for producing a plastic molded part (1), wherein, in the method, a mold insert (3) with a diffractive surface relief (32) is provided, the mold insert (3) is inserted into one mold half of an injection mold (5) which, together with at least one further mold half, forms a cavity for producing the plastic molded part (1), wherein the mold insert (3) is inserted into the injection mold (5) such that the diffractive surface relief (32) forms a partial area of the surface of the cavity formed by the mold half (5), and the plastic molded part (1) is molded by injection molding by means of the injection mold (5). The invention furthermore relates to a mold insert as well as an injection mold for such a method, as well as a plastic molded part produced in this way.

Abstract: The present invention describes methods and apparatuses for creating superposition shape images by superposed base and revealing layers of lenslet gratings. The superposition shape images form a message recognizable by a human observer or by an image acquisition and computing device such as a smartphone. The superposition shape images may be created by different superposition techniques ranging from 1D moiré, 2D moiré and level-line moiré superposition techniques to lenticular image and phase shift superposition techniques. Moiré superposition techniques enable creating superposition shape images at different apparent depth levels. Applications comprise the protection of documents and valuable articles against counterfeits, the creation of eye-catching advertisements as well as the decoration of buildings and exhibitions.

Abstract: The present invention relates to a method for manufacturing a photo-alignable object. The invention further provides compositions for the manufacturing of a photo-alignable object as well as different embodiments of photo-alignable objects and devices using them.

Abstract: A manufacturing method of a side view type light emitting device including a package body made of a synthetic resin material, the manufacturing method includes: providing an injection molding mold, for injection-molding the package body, including: a first mold provided with a first convex part for forming an upper surface side flat part on an upper surface of the package body; and a second mold provided with a first concave part for forming the upper surface side flat part; and fitting the first concave part around the first convex part so as to enter a liquid tight state with no space, injecting the synthetic resin material into each of the first and second molds so as to be filled therein, and hardening the synthetic resin material to form the package body in a state in which the first mold and the second mold are aligned with each other.

Abstract: A tire mold or a tire mold segment can include an air compression cavity, which connects to multiple surface connection slots having dimensions between 10 and 300 microns, which can be suitable for selective removal of air in the mold. The air compression cavity, can be close to the outside ambient, allowing the air escaping the interior of the mold to be compressed, which can assist in preventing the rubber material from leaving the mold pattern surface.

Abstract: Promotional items with enhanced advertising messaging. More specifically, embodiments are directed to a metallic-finished promotional item with a laser-engraved message that is illuminated or backlit by incorporating a light source into the promotional item. The light source acts to illuminate or brighten the laser-engraved message when the light source is powered on. Furthermore, according to embodiments, when the light source is not in use, the laser-engraved message remains appealing, hereinafter referred to “daylight appeal”, due to its enhanced contrast with the surrounding metallic finish.

Abstract: A method for producing a microlens with a carrier wafer, in which a lens in one opening of the carrier wafer is molded into the carrier wafer by stamping of the lens and to a corresponding device for executing the method and to a microlens which has been produced using the method.

Abstract: Methods for making an apertured polymeric film web or a composite structure web are disclosed. These webs may be utilized as a topsheet in an absorbent article and can provide fluid handling and softness benefits.

Abstract: A longitudinal cladding member for a motor vehicle, a method for manufacturing the longitudinal cladding member, and a motor vehicle having such a longitudinal cladding member. The longitudinal cladding member is to be fixedly connectable to a body of the motor vehicle, and in an assembled state covers a longitudinal member at least on the visible side of the motor vehicle.

Abstract: Exemplary method and system for providing a diffractive configuration in an optical arrangement are provided. For example, a material can be provided with at least one patterned surface having a very high aspect ratio. The material can be connected with at least one portion of a waveguide arrangement using a pre-polymer adhesive composition. Further, the pre-polymer adhesive composition can be caused to polymerize so as to form the diffractive configuration which at least approximately replicates a structure or at least one feature of the patterned surface.

Abstract: A method and apparatus for making reflective surfaces within optically transmissive materials. The method includes steps of providing a blade having a sharp cutting edge, penetrating an optically transmissive material with the cutting edge to a predetermined penetration depth and moving the blade relative to the transmissive material to produce a continuous slit with reflective walls. The apparatus includes a material feeding mechanism configured to feed a flexible sheet in predefined stepped increments, a slitting blade with a surface portion having a root mean square surface profile roughness parameter below 100 nanometers, and a linear drive operatively associated with the slitting blade to reciprocally move the slitting blade perpendicular to a feed direction of the flexible sheet, where a stepped feed operation of the material feeding mechanism is alternating with a reciprocal operation of the linear drive.

Abstract: Methods of manipulating a color displayed by a transfer medium or substrate comprising iron oxide colloidal nanocrystals arranged within chains, wherein each chain of nanocrystals is encapsulated are described. The method includes (a) applying a magnetic field to the transfer medium or substrate to control the color displayed by the transfer medium or substrate; and (b) applying energy to at least some of the chains of nanocrystals at a level that destroys the encapsulation surrounding the chains of nanocrystals to which the energy is applied.

Abstract: The present invention general related to a reusable mold and a method of using the mold to manufacture contact lenses. The mold comprises a first mold half having a first mold surface in contact with a lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves is a precision press molded mold made from an oxide glass selected from a group consisting of borosilicates glass and fluorophosphates glass.